/home/build/work/batch/fs/direct-io.c: In function 'do_direct_IO':
/home/build/work/batch/fs/direct-io.c:1011:12: warning: 'from' may be used uninitialized in this function [-Wmaybe-uninitialized]
u = (to - from) >> blkbits;
^
/home/build/work/batch/fs/direct-io.c:1011:12: warning: 'to' may be used uninitialized in this function [-Wmaybe-uninitialized]